Office



l ssneets-'shee-c 1. y. =A.:- P MILLER & R. E'. GROSS,

Appgatus foyv Rendering Fat. A No. 229,446..- Patented J`une`h29,188Q.

A WITNBSSES 3Sheets-Sheet`2. A. 1:'. MILLER l8v R. E. GRSS.

Apparatus fqr Rendering Fat.

No. 229,446. Patented )une 29,1880.

INVENTOR A M? @40h/Z* add WITNESSES: v

ATTORNEY r -40 inders.

UNirED STATES ,PATENT GEEICE; -i

- AsA E. MILLER AND R'oRERl` E. eRoss,'oE NEW VYoRKgN-L SMDeRossi lAssreNoR frosAiD MILLER. .f f ,t

'A-PPARAfUs-Fon? REN DE a IN e` FAR' sPEcI'FIoATIoN formingpmmfmttersratent No. 229,446, dated rune aeQlesoff ApplicationfiledFebi'iuary 16,' 1'880.. t l i Be it known that we, AsA EMIILLER-and ROBERT EgGRoss, both of the city, county,

and State of NewYork, have inventedcertain new. and useful Improvementsinl `Apparatus for Rendering Fat,of1which the following is aspecification. l Y

This invention'has reference toan improved apparatus -for renderingVanimal orother fats i' 1o for the purpose of obtaining a pure and clearoil, which is to be vused in the manufacture of artificial buttergtheapparatus being so constructed as to extract the oil from the bashed;animal tissues in a rapid and economical .1hanner, to be lclarifiedafter rendering, softhat Ainal-lyfa 'sweetLandi-'odorlesshilf-fisobtained* and of a steam-jacketed oil-receiver,.in which the oil is collected for lfinal cooking, together withmechanism for operating the parts, as will be morefullydescribedhereinafter,and inally pointed outin the claims.- ln theaccompanyingdrawings; Figure 1 represent-s a top view, Fig. 2 averticali transverse section on linel fr,"Fig. 1, l'Fig.' 3 a verticallongitudinal -seoti'on on liney y, Fign2, and Fig. 4 an end vieW,of ourapparatusfor render 3 5 ing fat. `.Fig..5 is a vertical'trausverseseotion of the apparatus fom-endering fatapdlofnone of thehalshers ,f and Fg is'asidefyiew of the apparatus` for renderingfat,showing the reversing 1n chanisin fo'r the steam-,heated cyl-Similar-lettersof 'reference indicate corresponding parts.

- A A inV the drawingsrep{resent}two` hollow' cylinders, of`V suitablesiaefandof sufficient strength to sustain asftea'mv ressureof at leastone hundred poundstoztlie, ureineh. The cylinders are iey'olved4 ybterineshin g; vcogwheels which receiveithe andpulleyfrom*axtransrnittingshaft, the hol-fy ;'1 low shafts ofthecylindersturning in? ra of the end wallsofasteamf-jac'l;eted'oil-receiver, f "j i B, of semicylind'ricalshape.V

The hollow revolving oylinderslA are sup plied through their hollowshaft/ps with steam Y or superheated steam, provision' being madej'55for drawing oil' the'water'of condensation, so-v that the cylinders arevlieptat auntormly high temperature. y

VBy a suitable` beltshit'ting arran gement and Y interlneshing gearing(shown'in Figsrdand) 6o" the cylinders may berevolved'iu lopposite di-vreotions, or toward 'each other; they being .placed close enoughsoras'gto form Contact with eachother.

ln theupper triangular spacebetween the v-cylindersA-A is-arranged arevolving agitator, C Vhoppers or chute's oi the hashersas shownnr Iupon whiehythe` fat is deliveredffrom the Fig.5,'said hoppers beingheated bysteam, so i `as to secure a rapid and uniform. delivery of 7olthehashed fatto the rendering apparatus The agitator transfers the fattothe surfzaf e of the revolving cylinders, thefheat ofwhichreau-sestire. fat to melt, so that the oil is sepa rated lfrom the lnehbrane or animaltissu-es,

and then strained oi throughfthe' piertorationsr of inclined side-walls,D, arrangedin the shape y of a hopper, at bothy sides of thecylii-iders.

In the angular spaces formed between the cylinders and the hopper-wallsare placed re- 8o volvin'g brushes E, ot' metal 'or other'rnaterial,which serve to brush the heated fat upon the cylinders aswell as todisintegrate the lumpy mass Adelivered by the hashers. .The brushesV arerevolved by lgear-wheels which mesh with 85" the gear-wheelsof theheated cylinders, which arepturned, during thelIst .part of theoperation, in opposite directionsto eachother,while 1 Y the brushesrevolve toward the same. j

, The hopper-walls D l),r are piifotedtanslfl fverse end wallsD Qran'djprovided with in: I wardlyturned endpiatesor wings,v soins-,tether 4oilcannoptfeseape between the' side and end' ,walls` Thehopper-fwallsDDaretransversely. connected by chains, eords,or otherwise, so 95 as to beraised orlowered, as required. When the hopper has be'eomecharged to itsfull capacity with scrap or crack-linge from which the" oil has' beendrained otl to the receiver, the. vhashingis suspended, but theinotionof the roc cylinders, agitator, and brushes continued until all the fathas passed over the surface of the heated cylinders and has been exposedto the action ofthe same; The beltisthen shifted and the motion of thecylinders reversed, so that they revolve torard each other, therebytakin g. up

the scrap and cracklin gs and pressing out the oil which is stillcontained in the same. The

hopper-walls are then raised nearly to a vertical position, so as totransfer all the scrap upon thecylinders, which press out all the oiland transfer it into the oil-receiver, where it is again cooked, andthen drawn oli'.

The cylinders are cleaned of the adhering scrap by means of scrapers F,arranged at the lower part of the same.

The operation of pressing the scrap is quickly accomplished, itrequiring only a limited period of time-say about ten minutes., Theoilextracted from the fat and pressed out of thescrap is collected inthe receiver,'and there thoroughly cooked, so as to form a homogeneousmassa-which is then drawn off by opening a valve of thedischarge-orifice of th"e"receiver.'1` The pressed scrap, being thustransferred to and deposited below the scrapersv in the receiver, isthen removed, the apparatus being stopped for this purpose.

The object of the pressing of the scrap and of the lsecond heating ofthe oil' Aexpressed therefrom is to extract any partiallyeliminated ornonrendered oil, which otherwise remains in the scrap, owing to therapid renderingproduced by the radiating-surface of the revolvingcylinders. the fat is therebyconsiderably increased, whle the exposureof the oil to the second radiatingsurface of the receiver raises it to ahigher temperature and produces a purer and superior product. V

The increased yield of oil and the more thorough cooking of the oil formthe most important feature of our invention.

During the cooking of the oil collected'n the receiver no partof thesame is allowed to pass off through the discharge-orifice a at thelowermost part ofthe oil-receiver, it being kept closed by a valve,stop-cock, or other device, b. As soon as the oil has been thoroughlycooked in the oil-receiver the valve is opened and the oil drawn olfthrough conveyers or pipes to the clarifying-vessels, a strainer beingplaced over the discharge orifice, which strainer is kept clear of scrapby a revolving brush, G.

The revolving motion `of the brush is imparted gear-wheelof which ispassed throughastungbox of the end wall of the oil-receiver to the4.eatin use, is the result.

Thepercentage of oil rendered from by a transmitting-gear, the shaft ofone outside, where it is connected by a pulley and belt to thedriving-shaft. As soon as the oil is all drawn off from thereceiver intothe clar' fying vessel or vessels the receiver is cleaned of the scrapsand cracklings, the hashers are started again, the revolving cylindersare reversed, and the supply of hashed fat continued until the apparatusis fully charged, as before described. The motion of the cylinders isthen again reversed, thoroughly cooked inthe oiLreceiver, and then drawnod'. i

. It will be observed that by our process and apparatusthe oil is notimmediatelydrawn olf and continuouslyconveyed away from the heat and theanimal tissues,but retained for a suicient length of time in theapparatus to be thoroughly cooked. The exposure of the fat to theextracting heat of the cylinders, together with the pressing out thescrap, extracts all the voil contained in the fat, so that a more.advantageous rendering of the fat, as compared to the continuousprocesses at pres- Havi' g' thus described our invention, we claim aslnew and desire to secure by Letters Patent- '1. In an apparatus forrendering fat, the

combination of rotary cylinders provided with the scrap pressed, and theoil hollow journals for admitting steam, an agil tator located above thecylinders, rotary side brush es, and mechanism for revolving the saidcylinders, agitator, and brushes, as shown and described. i

2,. In an apparatus for rendering fat, the combination of rotarycylinders provided with hollow journals forV admitting steam, rotaryside brushes, mechanism forrevolving said cylinders and brushes, and aninclosinghopper having adjustable perforated `side walls, substantiallyas described.

3.,In anrapparatus for renderingffat, the

IOO

combination of rotary'cylinders provided with hollow journals foradmitting steam, an agi-f tator located above the cylinders, Arotaryside brushes,

with a steam-jacketed oil-receiver, in 4which the oil is collected forfinal cooking, as "set ruary, 1880.

' ASA F. MILLER.

ROBERT GROSS.' Witnesses PAUL GOEPEL, CARL KARP.

and a hopper with perforated walls`,v

jrs

